Google Mobile will now deliver voice search form most BlackBerry smartphones. You can a try it by visiting http://m.google.com on your Blackberry. To search by voice, hold down the Talk button on your BlackBerry and then speak your search term into the phone.

The app also suggests letters when you type.

Google Mobile also now supports My Locations for BlackBerry OS 4.1 or higher and BlackBerry OS 4.2 or higher for Voice Search.